Oh, so it really WAS a stupid question! Sounds like CEL is generic for what VW calls MIL. Yes, I wouldn't be surprised if it's illegal to sell the car here too (though we have no emissions inspections). I don't trust the dealer at all, which is good reason not to buy from them, though I think they're hurting themselves with such carelessness and if I can get a good enough deal. . . .

Your name is Orlando and you live in Dystopia? That doesn't help us to know what is a normal temp range for your location.

__________________~“I'm selfish, impatient and a little insecure. I make mistakes, I am out of control and at times hard to handle. But if you can't handle me at my worst, then you sure as hell don't deserve me at my best.”― Marilyn Monroe
2015 Tornado Red Golf TDI Sportwagen SE, new on 2 SEP 2017, DSG, big sunroof. Lovin it!

Your name is Orlando and you live in Dystopia? That doesn't help us to know what is a normal temp range for your location.

Ha! It's FREEZING here (Columbus Ohio) and has been for two weeks. What could be more dystopian than the midwest?

After a month of following prices and test driving, I decided not to buy one of the 2015s. Two GSWs with the SEL trim dropped under $18K (!) here (and two others dropped to ca. $19K), but the both had an MIL with emissions-related problems. (I confess I was going to buy one of them anyway if it came down another $500, but it sold first.) Now none are for sale in central Ohio for under $20K.

I expect a large majority of VWs with ad blue systems fail in the heater dpt. It is a know problem. My TREG tdi ad blue heater failed at 35K miles,replaced by VW under good will. Light just came on for a few days at 55k miles. I may be going back for another replacement. No big deal as long as they pay for it. I do have a 100m 10yr extended warranty which has been very handy.

Ha! It's FREEZING here (Columbus Ohio) and has been for two weeks. What could be more dystopian than the midwest?

After a month of following prices and test driving, I decided not to buy one of the 2015s. Two GSWs with the SEL trim dropped under $18K (!) here (and two others dropped to ca. $19K), but the both had an MIL with emissions-related problems. (I confess I was going to buy one of them anyway if it came down another $500, but it sold first.) Now none are for sale in central Ohio for under $20K.

I grew up in Waverly. Yeah, I know the freaking out every time there is 2" of snow.

FWIW, I have a 2015 that I bought in September and have been driving here in Anchorage since then. Yes, I have a garage, but it's parked at work in sub freezing temps all day and I have had no problems.
Good luck.

__________________~“I'm selfish, impatient and a little insecure. I make mistakes, I am out of control and at times hard to handle. But if you can't handle me at my worst, then you sure as hell don't deserve me at my best.”― Marilyn Monroe
2015 Tornado Red Golf TDI Sportwagen SE, new on 2 SEP 2017, DSG, big sunroof. Lovin it!

If you have the ability to reset the code, do it. My '14 Passat SEL def heater threw the code a few thousand miles ago (135k now). I researched the least costly replacement (T-Reg part with harness mod) and decided to try resetting first. After two or three resets a couple of days apart no more code or dash light. We are in the middle of some of the coldest weather in years, single digit nights and teens by day. Indicated -4F on my commute last week.

So the car threw the code again, just before we got the fix. I cleared it (since it was technically out of warranty at the time) and the dealer did the fix without any issues. It's now thrown the code post-fix and goes in tomorrow for repair. We'll see if they replace the AdBlue tank again, or check for loose connections. It seems that the code only show up in cold weather (which would make sense, since that's when it needs the heater.)